Cushion-tire



F. A. KHUSEMARK, L. G. FUNKHOUSER AND H. G. CARPENTER.

CUSHION TIRE. APPLICATION msn MAR. Il, |918.

Patented June 22, 1920.

Juve ntoz s C UNITED STATES FREDERICK AUGUSTUS KBUSEMARK, LUTHER G.

PATENT OFFICE.

FUNKHOUSER, AND HARRY G.

CARPENTER, OF ROANOKE, VIRGINIA, ASSIGNORS T0 K. F. & C. TIRE & RUBBERCORPORATION, OF ROANOKE, VIRGINIA, A CORPORATION OF VIRGINIA.

V(loslaten-'1:11am

Application filed March l1,

To all 'whom 'it may concern Be it known that we, Flinonnicn A.KRUSEMARK, LUTHER G. FUNKHoUsnn, and HARRY Gr. CARPENTER, citizens,respectively, of the United States of America, and residents,respectively, of Roanoke, county of Roanoke, State of Virginia, haveinvented certain new `and useful Improvements in Cushion-Tires, of whichthe following is a full and clear specification.

The objects of this invention are to provide for a substantiall equaldistribution of the resiliency and t us promote smooth running, also toincrease the durability of the tire by )roviding for ample ventilationto thereby issipate the heat engendered by the traction, as more fullyhereinafter set forth. i

In the drawings-- i Figure 1 is a side elevation of a portion of a tireconstructed in accordance with our invention;

' Fig. 2 is a plan View looking at the tread surface, the tread surfacebeing partly broken away;

Fig. 3 is a detail sectional vieWon the line 3--3 of Fig. 1;

Fi s. 4 and 5 are views similar to Fig. 2 showing slight modilications.

Our improved tire is solid expcpyt that it is provided witlrtwocircumferential series of passages a, extending entirely through thetire from side to side, The series of pasA sages a is adjacent to therim side of the tire, andthe other passages b are arranged in a zonenearer the tread surface thereof. One series of passages is staggeredwith reff erence to the other series, the passages of this series beingsufficiently wide to overlap the adjacent transverse edges of the otherpassages thereby forming virtually two series of pi lars, one series(flying between the outer passages Z) and the rim face of the tire.`While the other series (l lies between the ad .'acent ends .of the outerseries of passages,

lach of the passages is preferably approxi4 mately crescent shaped incross-section, their longitudinal edges being rounded at e, andthe-tread side of the passages being eoncaved toward the tread surfaceWhile the opposite Walls of the passages are convened in thesameidirection. l i

As shown in Figs. 1 and 2, the passages a Specification o! LettersPatent.

Patented June 22. 1.920.

191s, Serial No. 221.705.

and b extend ohliquely across the tire1 while in Fig. L1 the passagesextend across the tire in a curved line. In Fig. 5 the passages arezigzag across. lily arranging the passages in any one of these ways orany other equiv alent way, it will be observed that under load strainsthe passages will be collapsed progressively. the collapsing beginningat one end of the passage and traveling toward the midiength of thepassage. and'that be fore each passage is collapsed to the fullestdegree (which degree depends of course on the load) the next succeedingpassage *will begin to collapse. ln other words. by thus inclining thepassages across the tire, the load will at no time be altogether on oneof the pillars or over one of thepassages, but will at all times bedistributed among the pillars, thereby eliminating a lumpy effect inruiming and thus promoting smooth runnin of the vehicle.

Extending cireumferentiaily through the tire, adacent to the archedwalls of each series ot passages; is a series of fabric strips f. f' andadjacent to these stri is or bands f. f is another series oi bands gi.o' arranged in a serpentine manner in the body of the tire. These bandsf and (f and j" and y are desirably constructed of single cords lyingside by side. but they may be formed of a woven fabric, if desire/l. Theserpentine bands 1,1 dip toward the riin sido of the tire at points hadjacent to the arch of each of the passages u, and between these pointsiz. the bands curve outwardly toward the tread surface and conformsubstantially to the curvature of the inner wall of the adjacent outerpassages b. rPhe outer ser` pentine hands y are arraluged in 'the samemanner. Through the tread surf-.wc of the tire extends a breaker strip iwhich lies close to the outer bends of the bands y. 'lbr arv rangementof bands 'lescriled is intended for the purpose of resisting roilapsingand compressing strains and to at the same time distribute the strainsamong as many pillars c and d as is possible. The bands are all drawntaut in the process of making the tire, so that as each passage iscollapsed, or partly collapsed. by the load, it will he observed thatthe forcing of the inwardly-dipping parts of the bands toward the rimcauses the bands to transmit the strains to the adj-firent pillars7 timenot only resisting any collapsing tendency but also greatly increasingresiliency.

In addition to the reini'ol'ring; cords or bands we have described, itis obvious that we may employ thtI spiral arrangement ot' bands shown inPatents Nos l, 7,953 and 1,277,789, dated September 1918.

It will be further understood that the in- Wardlydlipped portions if, ofthe hands may be given :In extra degree ot' tzmrnvss in the manner setforth in our Suid impending up" plicaton, if desired.

The nature und scope of the invention hnving been thus indicated anniits preferred embodiment having heen Specifically dvsrrihedT what isclaimed ns new is:

A cushion tire provided with :1 circumferential series of transversepassages and :L band of' ihrons material embedded in the tire betweensaid passages :1nd the trend surface thereof, sind passages haring theirouter walls arched toward the tread Snrfave and said hands beingr dippedinwardly toward Suid arched mills.

In testimony irllereol' we hereunto :illix our signatures this day ofMur. HHH.

FREDERICK. AUG USTUS KRUSEMARK. LUTHER G. FUNKIIUUSER. HARRY (l.CARPENTER.

